This is my first review but it felt like I needed to do one after finishing the last chapter. Signal is a very good drama, the kind of drama you feel compelled to recommend to a non drama viewer. Not because it's seems American, but because its "goodness" it's beyond nationality or language. In short: What I liked: -Most of the acting and their script is great, you feel the characters, and they feel like real human beings; with real human reactions. -The plot; and how all the sub-plots connect into one big story which slowly unfolds. -How the fantastic element is inserted, the "rules" they come up to (you'll understand this when you see it), but it doesn't feel "cheap" and it could've been. -The direction and production is very good for a TV product. What I didn't like: -Sometimes the editor/director feels like he has to over-explain some things that are pretty clear, so you'll find yourself re-watching some scenes from time to time (it's not a big problem, but it's something to mention). -The acting overall is very good but, OMG Kim Hye Soo "surprised face" is... well, very bad =P If you're looking for romance, there's almost none, so this is not the drama for you. But, if you're looking for a good story, with good and unexpected twists, good characters and acting with high production values, this drama is for you. Also, the violence is there, but it's not excessive, and for those who complain about the ending; let me tell you that it's consistent with the rest of series, you'll not feel disappointed.